結果
| 問題 |
No.3093 Safe Infection
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2025-04-06 23:12:22 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
AC
|
| 実行時間 | 1,126 ms / 2,000 ms |
| コード長 | 2,052 bytes |
| コンパイル時間 | 422 ms |
| コンパイル使用メモリ | 82,432 KB |
| 実行使用メモリ | 115,964 KB |
| 最終ジャッジ日時 | 2025-04-06 23:13:03 |
| 合計ジャッジ時間 | 32,439 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 70 |
ソースコード
import sys
import heapq
input = sys.stdin.readline
class UnionFind:
def __init__(self, n, w):
self.par = [-1] * n
self.rank = [0] * n
self.siz = [1] * n
self.weight = [[] for _ in range(n)]
self.cnt = n
for i in range(n):
for p in w[i]:
heapq.heappush(self.weight[i], p)
def root(self, x):
if self.par[x] == -1:
return x
self.par[x] = self.root(self.par[x])
return self.par[x]
def unite(self, x, y):
px = self.root(x)
py = self.root(y)
if px == py:
return False
if self.rank[px] < self.rank[py]:
px, py = py, px
self.par[py] = px
if self.rank[px] == self.rank[py]:
self.rank[px] += 1
self.siz[px] += self.siz[py]
self.cnt -= 1
if len(self.weight[px]) < len(self.weight[py]):
self.weight[px], self.weight[py] = self.weight[py], self.weight[px]
while self.weight[py]:
g = heapq.heappop(self.weight[py])
if self.root(g[1]) == px:
continue
heapq.heappush(self.weight[px], g)
return True
def count(self):
return self.cnt
def size(self, x):
return self.siz[self.root(x)]
def getweight(self, x):
return self.weight[self.root(x)]
N, M, K = map(int, input().split())
A = list(map(int, input().split()))
G = [[] for _ in range(N)]
for _ in range(M):
u, v = map(int, input().split())
u -= 1
v -= 1
G[u].append((A[v], v))
G[v].append((A[u], u))
UF = UnionFind(N, G)
dp = [(A[i], i) for i in range(N)]
heapq.heapify(dp)
while UF.count() > 1:
if not dp:
break
a, i = heapq.heappop(dp)
ri = UF.root(i)
heap = UF.getweight(i)
while heap:
s, j = heapq.heappop(heap)
rj = UF.root(j)
if ri == rj:
continue
if s - a > K:
print("No")
sys.exit()
UF.unite(i, j)
break
print("Yes")